Shelving unit



FIG. 1 is a left side elevational view of a shelving unit showing my new design, the right side being a mirror image of that shown;

FIG. 2 is a vertical cross-sectional view thereof, taken through the center of FIG. 4;

FIG. 3 is a perspective view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a shelving unit, as shown and described. 